triqs::stat::accumulator::compress_linear_bins

#include <triqs/stat/accumulator.hpp>

Synopsis

void compress_linear_bins (int compression_factor)

Increases the capacity of each linear bin by a integer scaling factor and compresses all the data into the smallest number of bins with the new capacity.

Parameters

• compression_factor Scaling factor by which to increase capacity; if < 2 nothing is done.

Example

#include <triqs/stat/accumulator.hpp>
#include <iostream>

using namespace triqs::stat;

int main() {
  // Accumulating a simple scalar
  // Defines linear bins of capacity 1, up to a maximum of 100 bins
  accumulator<double> my_acc(0.0, 0, 100, 1);

  my_acc << 0.0 << 1.0 << 2.0 << 3.0 << 4.0;

  std::cout << "Bin Capacity: " << my_acc.lin_bin_capacity() << std::endl;
  std::cout << "Data:" << std::endl;
  for (auto &x : my_acc.linear_bins()) {
    std::cout << x << std::endl; // 0.0, 1.0, 2.0, 3.0, 4.0
  }

  std::cout << "*********" << std::endl;

  my_acc.compress_linear_bins(2); // Compress by a factor two by hand

  std::cout << "Bin Capacity: " << my_acc.lin_bin_capacity() << std::endl;
  std::cout << "Data:" << std::endl;
  for (auto &x : my_acc.linear_bins()) {
    std::cout << x << std::endl; // 0.5, 2.5, 4.0
  }
}

Output

Bin Capacity: 1
Data:
0
1
2
3
4
*********
Bin Capacity: 2
Data:
0.5
2.5
4